US2007175297A1PendingUtilityA1

Launder burner

45
Individually held — no corporate assignee on recordPriority: Jan 30, 2006Filed: Jan 30, 2006Published: Aug 2, 2007
Est. expiryJan 30, 2026(expired)· nominal 20-yr term from priority
Inventors:John R. Hugens, Jr.Thomas F. Robertson
F27D 3/145F27B 1/16C21B 7/14F23G 5/24F23G 2202/20F27B 1/21F27B 3/045C21B 7/12
45
PatentIndex Score
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Claims

Abstract

A launder is configured to convey a stream of molten metal from a tap hole in a vertical shaft melting furnace. A burner is arranged to fire in a direction extending upstream through the launder toward and into the furnace through the tap hole. In this arrangement, the burner can preheat both the furnace and the launder.

Claims

exact text as granted — not AI-modified
1 . An apparatus comprising: 
 a launder configured to convey a stream of molten metal from a tap hole in a vertical shaft melting furnace; and    a burner arranged to fire in a direction extending upstream through the launder toward and into the furnace through the tap hole, whereby the burner can preheat both the furnace and the launder.    
   
   
       2 . An apparatus as defined in  claim 1  wherein the burner is a nozzle mix burner.  
   
   
       3 . An apparatus as defined in  claim 1  wherein the burner is a premix burner.  
   
   
       4 . An apparatus as defined in  claim 1  wherein the burner is mounted on a side wall of the launder.  
   
   
       5 . An apparatus as defined in  claim 1  wherein the launder has a first section extending in a straight line from the tap hole, and has a second section extending at an angle from the first section, and the burner is mounted on the second section of the launder.  
   
   
       6 . A method of preheating a vertical shaft melting furnace with a launder configured to convey a stream of molten metal from a tap hole in the furnace, comprising: 
 preheating both the furnace and the launder by firing a burner in a direction extending upstream through the launder toward and into the furnace through the tap hole.    
   
   
       7 . A method as defined in  claim 6  wherein the burner is fired in a fuel rich condition.  
   
   
       8 . A method of retrofitting a launder configured to convey a stream of molten metal from a tap hole in a vertical shaft melting furnace, comprising: 
 installing a burner arranged to fire in a direction extending upstream through the launder toward and into the furnace through the tap hole, whereby the burner can preheat both the furnace and the launder.    
   
   
       9 . A method as defined in  claim 8  wherein the burner is a nozzle mix burner.  
   
   
       10 . An apparatus as defined in  claim 8  wherein the burner is a premix burner.  
   
   
       11 . A method as defined in  claim 8  wherein the launder has a side wall and the burner is mounted on the side wall.

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